/**
* ValidateMetadataExtension Handler - Validate ABAP MetadataExtension Name
*
* Uses AdtClient.validateMetadataExtension from @mcp-abap-adt/adt-clients.
* Low-level handler: single method call.
*/
import { AdtClient } from '@mcp-abap-adt/adt-clients';
import type { HandlerContext } from '../../../lib/handlers/interfaces';
import {
type AxiosResponse,
parseValidationResponse,
restoreSessionInConnection,
return_error,
return_response,
} from '../../../lib/utils';
export const TOOL_DEFINITION = {
name: 'ValidateMetadataExtensionLow',
description:
'[low-level] Validate an ABAP metadata extension name before creation. Checks if the name is valid and available. Returns validation result with success status and message. Can use session_id and session_state from GetSession to maintain the same session.',
inputSchema: {
type: 'object',
properties: {
objName: {
type: 'string',
description: 'MetadataExtension name to validate (e.g., Z_MY_PROGRAM).',
},
session_id: {
type: 'string',
description:
'Session ID from GetSession. If not provided, a new session will be created.',
},
session_state: {
type: 'object',
description:
'Session state from GetSession (cookies, csrf_token, cookie_store). Required if session_id is provided.',
properties: {
cookies: { type: 'string' },
csrf_token: { type: 'string' },
cookie_store: { type: 'object' },
},
},
},
required: ['name', 'description', 'package_name'],
},
} as const;
interface ValidateMetadataExtensionArgs {
name: string;
description: string;
package_name: string;
session_id?: string;
session_state?: {
cookies?: string;
csrf_token?: string;
cookie_store?: Record<string, string>;
};
}
/**
* Main handler for ValidateMetadataExtension MCP tool
*
* Uses AdtClient.validateMetadataExtension - low-level single method call
*/
export async function handleValidateMetadataExtension(
context: HandlerContext,
args: ValidateMetadataExtensionArgs,
) {
const { connection, logger } = context;
try {
const { name, description, package_name, session_id, session_state } =
args as ValidateMetadataExtensionArgs;
// Validation
if (!name || !description || !package_name) {
return return_error(
new Error('name, description, and package_name are required'),
);
}
const client = new AdtClient(connection);
// Restore session state if provided
if (session_id && session_state) {
await restoreSessionInConnection(connection, session_id, session_state);
} else {
// Ensure connection is established
}
const ddlxName = name.toUpperCase();
logger?.info(`Starting metadata extension validation: ${ddlxName}`);
try {
// Validate metadata extension
const validationState = await client.getMetadataExtension().validate({
name: ddlxName,
description: description || '',
packageName: package_name || '',
});
const validationResponse = validationState.validationResponse;
if (!validationResponse) {
throw new Error('Validation did not return a result');
}
const result = parseValidationResponse(
validationResponse as AxiosResponse,
);
// Get updated session state after validation
logger?.info(
`✅ ValidateMetadataExtension completed: ${ddlxName} (valid=${result.valid})`,
);
return return_response({
data: JSON.stringify(
{
success: result.valid,
name: ddlxName,
validation_result: result,
session_id: session_id || null,
session_state: null, // Session state management is now handled by auth-broker,
message: result.valid
? `MetadataExtension ${ddlxName} is valid and available`
: `MetadataExtension ${ddlxName} validation failed: ${result.message}`,
},
null,
2,
),
} as AxiosResponse);
} catch (error: any) {
logger?.error(`Error validating metadata extension ${ddlxName}:`, error);
// Parse error message
let errorMessage = `Failed to validate metadata extension: ${error.message || String(error)}`;
if (error.response?.status === 404) {
errorMessage = `MetadataExtension ${ddlxName} not found.`;
} else if (
error.response?.data &&
typeof error.response.data === 'string'
) {
try {
const { XMLParser } = require('fast-xml-parser');
const parser = new XMLParser({
ignoreAttributes: false,
attributeNamePrefix: '@_',
});
const errorData = parser.parse(error.response.data);
const errorMsg =
errorData['exc:exception']?.message?.['#text'] ||
errorData['exc:exception']?.message;
if (errorMsg) {
errorMessage = `SAP Error: ${errorMsg}`;
}
} catch (_parseError) {
// Ignore parse errors
}
}
return return_error(new Error(errorMessage));
}
} catch (error: any) {
return return_error(error);
}
}
